One common theme is isolation. Naruto would feel alone because of his parents' neglect. Another theme is the search for identity. He has to figure out who he is without the normal parental support. And there's also the theme of sibling rivalry, although it's more one - sided in this case.
A plotline might involve Naruto starting to act out in negative ways to get his parents' attention. He could start getting into trouble at school or in the village. Maybe he would start to explore his own powers in secret, away from his family, and discover some unique abilities that he then uses to show his parents what they've been missing. Also, there could be a plotline where Naruto tries to build a relationship with his sister in secret, hoping that through her, he can get closer to his parents.
This kind of fanfiction is really exploring the darker side of family relationships. Naruto, who is already a character with a difficult past in the original story, would be even more burdened here. The neglect from his parents could make him develop some negative traits. He might become resentful, not just towards his parents but also towards his sister, at least initially. However, this could also be a setup for a great character arc where he overcomes this pain and learns to love and accept his family again.
A plot for this type of fanfic could revolve around Naruto's inner turmoil. He could be constantly haunted by the question of why his parents neglected him. This could lead him to make some bad decisions, like getting involved with the wrong people. However, through a series of events, he starts to realize that he can create his own family and support system. He then begins to build a new life for himself, one that is not defined by his parents' neglect but by his own strength and the relationships he chooses to cultivate.
In such fanfics, it often adds a deep layer of emotional turmoil to Naruto's character. He may become more self - reliant and desperate for recognition. This neglect can drive his actions and shape his relationships, like making his bonds with his friends even stronger as he seeks the acceptance he doesn't get at home.
In fanfiction, Naruto having the Rinnegan and being neglected by parents can lead to some really interesting character development. It could make him more self - reliant and distrustful at first. He might have to learn to harness the power of the Rinnegan on his own, without any parental guidance. This could result in him making some mistakes along the way but also growing stronger in unique ways.
In this type of fanfic, it could be that Naruto's sister is ill or has some special condition that requires a lot of care from their parents. So, Naruto is pushed to the side. However, Naruto being Naruto, he still tries to find his own way in the ninja world. He might find a mentor outside of his family who sees his potential and helps him grow. Eventually, he could come to terms with his family's situation, or they could realize that they've been neglecting him and try to make amends.
Naruto would likely become more independent. Since he's being neglected, he has to rely on himself. He might become a bit more of a lone wolf at first, not trusting others easily as he feels his own family has let him down. But this could also make him stronger in the long run. He'd have to figure out things on his own, like how to control the Nine - Tails' power without much family support.
One key theme could be family dynamics. Since Naruto is neglected, it might explore how his sister could potentially change his situation or their relationship. Another theme could be self - discovery. Naruto may find new aspects of himself with his sister's influence. Also, it might touch on the theme of redemption, perhaps for those who neglected Naruto in the first place.
One possible scenario in such a fanfiction could be that Naruto's parents are preoccupied with their shinobi duties. They might be constantly on missions for the Hidden Leaf Village, leaving Naruto at home with caretakers who don't really pay him much attention. This could lead to Naruto feeling lonely and isolated, just as he did in the original story when he thought he had no family.